IL299455A - Cell frame, electrochemical cell, cell stack and method of operation - Google Patents

Cell frame, electrochemical cell, cell stack and method of operation

Info

Publication number
IL299455A
IL299455A IL299455A IL29945522A IL299455A IL 299455 A IL299455 A IL 299455A IL 299455 A IL299455 A IL 299455A IL 29945522 A IL29945522 A IL 29945522A IL 299455 A IL299455 A IL 299455A
Authority
IL
Israel
Prior art keywords
cell
electrolyte
channel
fed
flow
Prior art date
Application number
IL299455A
Other languages
Hebrew (he)
Original Assignee
Fraunhofer Ges Forschung
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fraunhofer Ges Forschung filed Critical Fraunhofer Ges Forschung
Publication of IL299455A publication Critical patent/IL299455A/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
    • H01M8/184—Regeneration by electrochemical means
    • H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0289—Means for holding the electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2459—Comprising electrode layers with interposed electrolyte compartment with possible electrolyte supply or circulation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)
  • Battery Mounting, Suspending (AREA)
  • Hybrid Cells (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)

Claims (16)

KJ/KJ 200083WO16. Dezember 2022 Claims
1. Cell frame (4) for forming an electrochemical cell (2), in particular of a redox flow battery, peripherally enclosing at least one cell interior (5) and comprising at least one feed channel (13) for feeding electrolyte into the cell interior (5), wherein the feed channel (13) has an inlet opening (18), spaced from the cell interior (5), for the electrolyte to be fed and an outlet opening (19), adjacent to the cell interior (5), for the electrolyte to be fed to flow out into the cell interior (5), characterized in thatthe feed channel (13) has at least one transport channel (21), connecting at least in sections the inlet opening (18) with the outlet opening (19), for transporting the electrolyte through the feed channel (13) into the cell interior (5) and at least one return channel (22) for partially returning the electrolyte to be fed counter to the transport direction (T) of the electrolyte to be fed in the transport channel (21), in that the return channel (22) is in fluid contact with the transport channel (21) via in each case at least one entry opening (25) for entry of the electrolyte to be returned and exit opening (26) for exit of the electrolyte to be returned, the entry opening and exit opening being spaced from one another in the transport direction (T) of the electrolyte to be fed.
2. Cell frame according to claim 1, characterized in that the transport channel (21) has, at least in sections between the at least one entry opening (25) and the at least one exit opening (26) in each case of the return channel, a flow chamber (27) in such a way that the electrolyte to be fed can flow alternately, preferably at an at least substantially constant frequency, in at least two different main flows into the direction of the outlet opening (19) through the - 2 - flow chamber (27) and, as a result of this, flow in at least two different outlet directions out of the outlet opening (19) into the cell interior (5), and in that, preferably, the flow chamber (27) is designed in such a way that the frequency increases, at least substantially linearly, with increasing volume flow through the transport channel (21).
3. Cell frame according to claim 1 or 2, characterized in that the transport channel (21) has, at least in sections between the at least one entry opening (25) and the at least one exit opening (26) in each case of the return channel (22), a flow chamber (27) in such a way that the flow chamber (27) forms, at least in sections, a free flow cross-section with a cross-sectional area which corresponds to at least 2 times, preferably at least 2,5 times, in particular at least 3 times, the cross-sectional area of the free flow cross-section of the inlet opening (18, 23) and/or of the outlet opening (19, 24) of the feed channel (13) and/or of the transport channel (21).
4. Cell frame according to claim 2 or 3, characterized in that the cross-sectional area of the free flow cross-section of the outlet opening (19) of the feed channel (13) is larger than the cross-sectional area of the free flow cross-section of the outlet opening (28) of the flow chamber (27), and in that, preferably, the transport channel (21) is designed to widen, preferably directly, after the flow chamber (27) in the transport direction (T) of the electrolyte to be fed in a funnel-shaped manner, in particular merging into the outlet opening (19) of the feed channel (13).
5. Cell frame according to one of claims 1 to 4, characterized in that the feed channel (13) has at least two return channels (22) for partially returning the electrolyte to be fed counter to the transport direction (T) of the electrolyte KJ/KJ 200083WO16. Dezember 2022 - 3 - to be fed in the transport channel (21), in that the return channels (22) are arranged on mutually opposite sides of the transport channel (21), and in that, preferably, the return channels (22) are unconnected among one another.
6. Cell frame according to one of claims 1 to 5, characterized in that at least two, preferably at least four, in particular at least six, feed channels (13) are provided, and in that, preferably, the feed channels (13) are provided on the same side of the cell frame (4) and/or unconnected among one another, and in that, further preferably, the feed channels (13) are connected on the entry side to a common supply line (11).
7. Cell frame according to one of claims 1 to 6, characterized in that a filling element with an open-pored structure is provided in the cell interior (5), the filling element preferably filling the cell interior (5) at least substantially completely, and in that, preferably, the filling element is designed as one-piece filling element, felt-like, from graphite and/or as an electrode (6).
8. Cell frame according to one of claims 1 to 7, characterized in that the outlet channels (14) and/or the feed channels (13) of at least one cell frame (4) are arranged at least substantially uniformly distributed over one side of the at least one cell frame (4).
9. Electrochemical cell (2), in particular of a redox flow battery, having two half cells (3), wherein the half cells are separated from one another by at least one semipermeable membrane (7) and each have at least one cell frame (4) peripherally enclosing at least one cell interior (5) for electrolyte to flow through, characterized in thatat least one cell frame (4) is designed according to one of claims 1 to 8. KJ/KJ 200083WO16. Dezember 2022 - 4 -
10. Electrochemical cell according to claim 9, characterized in that the at least one cell interior (5) is bounded peripherally by the cell frame (4), to one side by the semipermeable membrane (7) and to the opposite side by an electrode (6) or a bipolar plate and/or in that the cell interior (5) and the cell frame (4) are arranged circumferentially in a frame plane.
11. Electrochemical cell according to claim 10, characterized in that the feed channel (13), the transport channel (21) and/or the return channel (22) is aligned at least substantially parallel to the frame plane and in that, preferably, the feed channel (13), the transport channel (21) and/or the return channel (22) is arranged over its entire longitudinal extent in the frame plane.
12. Cell stack (1), in particular of a redox flow battery, comprising a plurality of electrochemical cells (2) arranged side by side, adjacent to one another and firmly connected among one another, characterized in thatthe electrochemical cells (2) are designed according to one of claims 9 to 11.
13. Method of operation of an electrochemical cell (2) according to one of claims 9 to or of a cell stack according to claim 12,- in which electrolyte is fed to at least one cell interior (5) of at least one cell frame (4) of at least one half cell (3) via a feed channel (13),- in which the electrolyte, when flowing through the transport channel (21), in particular the flow chamber (27), forms temporally alternately at least two different main flows into the direction of the outlet opening and, as a result of this, flows alternately in at least two different outlet directions out of the outlet opening (19, 24) into the cell interior (5). KJ/KJ 200083WO16. Dezember 2022 - 5 -
14. Method according to claim 13,- in which the flow of the electrolyte, when flowing through the transport channel (21), in particular the flow chamber (27), changes temporally alternately between the at least two main flows, preferably with constant frequency and- in which, preferably, the frequency of the change of the flow of the electrolyte tobe fed alternately into the at least two main flows is at least substantially proportional to the volume flow of the electrolyte to be fed.
15. Method according to one of claims 13 or 14,- in which the at least two main flows are assigned to opposite sides of the flowchamber (27) and, preferably, opposite return channels (22) and/or- in which the electrolyte to be fed is distributed from at least one common supply line (11) to multiple feed channels (13) of at least one cell frame (4) and fed in parallel via the feed channels (13) to the cell interior (5). KJ/KJ 200083WO
16. Dezember 2022
IL299455A 2020-07-01 2021-07-01 Cell frame, electrochemical cell, cell stack and method of operation IL299455A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020117367.9A DE102020117367B4 (en) 2020-07-01 2020-07-01 Cell frame, electrochemical cell, cell stack and method of operation
PCT/EP2021/068187 WO2022003106A1 (en) 2020-07-01 2021-07-01 Cell frame, electrochemical cell, cell stack and operating method

Publications (1)

Publication Number Publication Date
IL299455A true IL299455A (en) 2023-02-01

Family

ID=76942981

Family Applications (1)

Application Number Title Priority Date Filing Date
IL299455A IL299455A (en) 2020-07-01 2021-07-01 Cell frame, electrochemical cell, cell stack and method of operation

Country Status (9)

Country Link
US (1) US20230290974A1 (en)
EP (1) EP4176480A1 (en)
JP (1) JP2023532722A (en)
KR (1) KR20230034327A (en)
AU (1) AU2021302697A1 (en)
CA (1) CA3187791A1 (en)
DE (1) DE102020117367B4 (en)
IL (1) IL299455A (en)
WO (1) WO2022003106A1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8029809U1 (en) 1980-11-07 1981-02-26 Siemens Ag, 1000 Berlin Und 8000 Muenchen Holding device for electrical devices, in particular for intrusion detectors
EP1051766B1 (en) 1998-01-28 2001-08-08 Squirrel Holdings Ltd. Redox flow battery system and cell stack
JP3682244B2 (en) 2001-06-12 2005-08-10 住友電気工業株式会社 Cell frame for redox flow battery and redox flow battery
US8450001B2 (en) * 2010-09-08 2013-05-28 Primus Power Corporation Flow batter with radial electrolyte distribution
DE102011122010A1 (en) * 2011-12-23 2013-06-27 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Redox flow battery with external supply line and / or disposal line
US10847844B2 (en) * 2016-04-26 2020-11-24 Calera Corporation Intermediate frame, electrochemical systems, and methods
CN109411782B (en) 2018-12-13 2023-09-08 中南大学 Liquid flow frame of all-vanadium redox flow battery

Also Published As

Publication number Publication date
EP4176480A1 (en) 2023-05-10
KR20230034327A (en) 2023-03-09
CA3187791A1 (en) 2022-01-06
DE102020117367A1 (en) 2022-01-05
US20230290974A1 (en) 2023-09-14
JP2023532722A (en) 2023-07-31
WO2022003106A1 (en) 2022-01-06
DE102020117367B4 (en) 2022-04-21
AU2021302697A1 (en) 2023-02-02

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